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Machine translation
1. (WO2013049858) A NOVEL EFFICIENT DIGITAL MICROPHONE DECIMATION FILTER ARCHITECTURE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2013/049858    International Application No.:    PCT/US2012/058373
Publication Date: 04.04.2013 International Filing Date: 01.10.2012
IPC:
H03H 17/06 (2006.01), G06F 17/10 (2006.01), H04R 3/00 (2006.01)
Applicants: CREATIVE TECHNOLOGY LTD [SG/SG]; 31 International Business Park Singapore 609921 (SG).
ROSSUM, David [US/US]; (US) (US only)
Inventors: ROSSUM, David; (US)
Agent: GEAN, Desmund; Creative Labs, Inc. 1901 Mccarthy Blvd Milpitas, CA 95035 (US)
Priority Data:
13/633,092 01.10.2012 US
61/542,098 30.09.2011 US
Title (EN) A NOVEL EFFICIENT DIGITAL MICROPHONE DECIMATION FILTER ARCHITECTURE
(FR) NOUVELLE ARCHITECTURE EFFICACE DE FILTRE DE DÉCIMATION DE MICROPHONE NUMÉRIQUE
Abstract: front page image
(EN)A new and more efficient filtering system (e.g., digital microphone decimation filter architecture system) is described. A key to this architecture is the use of two parallel filter paths. Each path operates at the output sample rate, and comprises a shorter FIR filter followed by a series of allpass stages (e.g., implementing IIR filters). The FIR filter is designed to remove all but the last octave of out-of-band noise. The allpass stages are designed such that when the two paths are summed together, the out-of-band noise for the final octave cancels out, leaving only the desired sign
(FR)L'invention concerne un nouveau système de filtrage plus efficace (comme un système d'architecture de filtre de décimation de microphone numérique). Un élément essentiel de cette architecture est l'utilisation de deux trajets de filtre parallèles. Chaque trajet fonctionne à la vitesse d'échantillonnage de sortie, et comprend un filtre FIR court suivi par une série d'étages passe-tout (par exemple mise en œuvre des filtres IIR). Le filtre FIR est conçu pour éliminer tous les octaves sauf le dernier du bruit hors-bande. Les étages passe-tout sont conçus de sorte que lorsque les deux trajets sont additionnés, le bruit hors-bande de l'octave final s'annule, laissant uniquement le signal voulu.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)